Asus P8Z77-V PRO/THUNDERBOLT - Manual (Page 100)

3-24 Chapter 3: BIOS setup
Chapter 3
3.5.3 SATA Configuration
While entering Setup, the BIOS automatically detects the presence of SATA devices. The SATA
Port items show Not Present if no SATA device is installed to the corresponding SATA port.
Use the scroll to display more items.
SATA Mode Selection [AHCI Mode]
Allows you to set the SATA configuration.
[IDE]
Set to [IDE] when you want to use the Serial ATA hard disk drives as
Parallel ATA physical storage devices.
[AHCI] Set to [AHCI] when you want the SATA hard disk drives to use the AHCI
(Advanced Host Controller Interface). The AHCI allows the onboard storage
driver to enable advanced Serial ATA features that increases storage
performance on random workloads by allowing the drive to internally
optimize the order of commands.
[RAID] Set to [RAID] when you want to create a RAID configuration from the SATA
hard disk drives.